One Shot is a team mode that’s for snipers only. You start matches with decreased health and pick a highly-specialized class. “Each class features the MORS, a bolt-action railgun sniper, along with a variety of perks, Scorestreaks, and Exo abilities,” Sledgehammer writes in its blog post.
Each of the five classes have been custom designed by our development team and OpTic NaDeSHoT, to test the true sniper skill of Advanced Warfare in this new custom mode
You have five classes to choose from: hard scope, zoomed, 4X, aced, and irons.
I was finally able to sign into psn on my ps4 about an hour ago. Started playing One Shot and fell in love. Took my mind completely off of the fact it's the first time I've been able to play in 3 days. This is definitely my new favorite game mode. I hope it's permanent.